Derivative Financial Instruments - Disclosure Details of the Changes in Gold Collar and Forward Contracts Outstanding (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Derivative Financial Instruments [Line Items]
Balance - beginning of year	$ 154,566
Balance - end of year	84,857	$ 154,566
Gold collars and forward contracts
Derivative Financial Instruments [Line Items]
Balance - beginning of year	91,393	0
Assumed in Leagold Acquisition (note 5(e))	0	78,526
Change in fair value	(16,605)	48,091
Settlements	(41,452)	(35,224)
Balance - end of year	$ 33,336	$ 91,393

Derivative Financial Instruments .

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- Definition

Derivative Financial Liabilities Assumed

+ References

No definition available.

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- Definition

The amount of financial liabilities classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The gains (losses) resulting from change in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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The gains (losses) recognised in profit or loss for liabilities measured at fair value that are attributable to the change in unrealised gains or losses relating to those liabilities held at the end of the reporting period. [Refer: At fair value [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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